I have searched on google and nothing found about lac (Indian numbering system) separator in SSRS report and I am familiar with thousand separators, I am using visual studio 2012.
for ex: input 1111500000, output like this: 11115,00,000.
I need 1000 separator and 100k separators both in same format expression.
Following should work for you:
In the format box
use
##\,##\,##0;
And this will format the number as per your requirements (i.e. 11115,00,000
).